255888631 has 2 divisors, whose sum is σ = 255888632. Its totient is φ = 255888630.

The previous prime is 255888551. The next prime is 255888643. The reversal of 255888631 is 136888552.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 255888631 - 2⁹ = 255888119 is a prime.

It is a super-2 number, since 2×255888631² = 130957982950108322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (255888691) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 127944315 + 127944316.

It is an arithmetic number, because the mean of its divisors is an integer number (127944316).

Almost surely, 2^255888631 is an apocalyptic number.

255888631 is a deficient number, since it is larger than the sum of its proper divisors (1).

255888631 is an equidigital number, since it uses as much as digits as its factorization.

255888631 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 460800, while the sum is 46.

The square root of 255888631 is about 15996.5193401565. The cubic root of 255888631 is about 634.8683307299.

The spelling of 255888631 in words is "two hundred fifty-five million, eight hundred eighty-eight thousand, six hundred thirty-one".